Home / 128,424.26-177,233.37-71,839.46

Finding the Fourth Proportional to 128,424.26, 177,233.37 and 71,839.46

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Solution

The fourth proportional to 128,424.26, 177,233.37 and 71,839.46 is: 99,142.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,424.26 : 177,233.37 = 71,839.46 : x
  2. Step 2: Convert to fraction form
    128,424.26/177,233.37 = 71,839.46/x
  3. Step 3: Cross multiply
    128,424.26x = 177,233.37 × 71,839.46
  4. Step 4: Simplify right side
    128,424.26x = 12,732,349,594.78
  5. Step 5: Solve for x
    x = 12,732,349,594.78/128,424.26
  6. Step 6: Final answer
    x = 99,142.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.